CN117791140A - Ultra-wideband notch antenna - Google Patents
Ultra-wideband notch antenna Download PDFInfo
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- CN117791140A CN117791140A CN202311647348.5A CN202311647348A CN117791140A CN 117791140 A CN117791140 A CN 117791140A CN 202311647348 A CN202311647348 A CN 202311647348A CN 117791140 A CN117791140 A CN 117791140A
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- 230000005855 radiation Effects 0.000 claims abstract description 30
- 238000005452 bending Methods 0.000 claims abstract description 15
- 239000000758 substrate Substances 0.000 claims description 14
- 230000008054 signal transmission Effects 0.000 claims description 8
- 239000000919 ceramic Substances 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000010897 surface acoustic wave method Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
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- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The invention discloses an ultra-wideband notch antenna which comprises an antenna magnet, an antenna radiation electrode and a leading-out end electrode, wherein the antenna radiation electrode and the leading-out end electrode are respectively arranged in the upper area and the lower area of the antenna magnet, a through hole is formed in the antenna magnet, and the antenna radiation electrode is connected with the leading-out end electrode through the through hole, so that the antenna can generate notch characteristics at the center frequency of 5.5 GHz. Bending grooves can also be etched on the surface of the antenna radiation electrode. The ultra-wideband notch antenna can ensure that the WiMAX frequency band at the 3.5GHz central frequency and the WiMAX frequency band and the WLAN frequency band at the 5.5GHz central frequency are not interfered with each other when the UWB frequency band is communicated.
Description
Technical Field
The invention relates to the field of wireless high-speed transmission, in particular to an ultra-wideband notch antenna.
Background
LTCC (Low-temperature cofired ceramics) technology, i.e., low temperature co-fired ceramic technology, is used to fabricate high precision passive integrated components such as filters, diplexers, balun, antennas, couplers, etc. Compared with other mainstream processes in the current market, such as a silicon wafer semiconductor process (Integrated Passive Device, IPD), a surface acoustic wave process (Surface Acoustic Wave, SAW) and the like, the LTCC process has the excellent characteristics of good high-frequency characteristic, flexible design, controllable process, adaptability to high current, high temperature resistance and the like.
The Ultra-Wideband (UWB) technology is mainly used for short-distance wireless high-speed transmission occasions, and has the advantages of high transmission rate, low time delay, large bandwidth, low transmitting power and the like; the frequency range of the UWB antenna is 3.1-10.6 GHz, and a wireless metropolitan area network (World Interoperability for Microwave Access, wiMAX, 3.3-3.79 GHz, 5.25-5.85 GHz) and a wireless local area network (Wireless Local Area Networks, WLAN, 5.15-5.825 GHz) in the frequency band can interfere with each other; to avoid mutual interference between multiple frequency bands, multiple notch characteristics need to be introduced on an ultra wideband antenna. At present, ultra wideband antennas based on LTCC technology are already applied in the market, but do not introduce multiple notch functions, and cannot avoid mutual interference between multiple frequency bands.
Disclosure of Invention
The invention aims to solve the technical problem of mutual interference among multiple frequency bands and provides an ultra-wideband notch antenna.
The technical problems of the invention are solved by the following technical scheme:
the ultra-wideband notch antenna comprises an antenna magnet, an antenna radiation electrode and a leading-out end electrode, wherein the antenna radiation electrode and the leading-out end electrode are respectively arranged in the upper area and the lower area of the antenna magnet, a through hole is formed in the antenna magnet, and the antenna radiation electrode is connected with the leading-out end electrode through the through hole.
In some embodiments, one end of the antenna radiating electrode is connected to a feed pin, and the lead-out electrode is disposed near the other end of the antenna radiating electrode, preferably, the lead-out electrode is U-shaped with an opening direction toward the outside of the antenna magnet.
In some embodiments, at least two empty pins are arranged at the end part of the antenna magnet, and two ends of the lead-out terminal electrode are respectively connected with the two empty pins.
In some embodiments, the antenna radiating electrode, the via, and the terminal electrode are symmetrical about the same central axis.
In some embodiments, the antenna radiation electrode includes a rectangular patch, and a bending groove is disposed on the rectangular patch, where the bending groove is a notch shape with a notch towards the outer side of the antenna magnet, and two broken channels of the bending groove are bent and extended perpendicularly towards the inside of the notch shape at the notch.
In some embodiments, the antenna radiation electrode further comprises a trapezoid branch, a lower bottom of the trapezoid branch is connected with the rectangular patch, and an upper bottom of the trapezoid branch is connected with a feed pin.
In some embodiments, the lower base length of the trapezoidal branch is greater than 3 times the upper base length.
In some embodiments, the antenna further comprises a dielectric substrate, a clearance surface, a floor and a signal transmission line are arranged on the dielectric substrate, the antenna magnet is arranged on the clearance surface of the dielectric substrate, a feed pin and a grounding pin are arranged on the antenna magnet, the feed pin is connected with the signal transmission line, and the grounding pin is connected with the floor.
In some embodiments, the antenna magnet is 10060 metric in size, the standard value of length, width and height is 10mm by 6mm by 1.2mm, the range of length is 10±0.3mm, the range of width is 6±0.3mm, and the range of height is 1.2±0.2mm.
In some embodiments, a LTCC antenna based on low temperature co-fired ceramic.
Compared with the prior art, the invention has the beneficial effects that:
according to the ultra-wideband notch antenna provided by the invention, the antenna radiation electrode and the leading-out end electrode are respectively arranged in the upper area and the lower area of the antenna magnet, the antenna radiation electrode is connected with the leading-out end electrode through the through hole, the notch characteristics of WiMAX at the center frequency of 5.5GHz and WLAN frequency can be increased, and preferably, the bending groove is etched on the surface of the antenna radiation electrode, so that the antenna generates the notch characteristics at the center frequency of 3.5GHz, and finally, the ultra-wideband notch antenna can enable WiMAX frequency at the center frequency of 3.5GHz and WiMAX frequency and WLAN frequency at the center frequency of 5.5GHz not to interfere with each other when in UWB frequency communication.
Other advantages of embodiments of the present invention are further described below.
Drawings
Fig. 1 is a schematic structural diagram of an ultra wideband notch antenna according to an embodiment of the present invention;
FIG. 2 is a side view of an ultra wideband notch antenna according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an antenna radiation electrode of an ultra wideband notch antenna according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a terminal electrode of an ultra wideband notch antenna according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an ultra wideband notch antenna applied to a dielectric substrate according to an embodiment of the present invention;
FIG. 6 is a graph comparing return loss of an ultra wideband notch antenna according to an embodiment of the present invention with that of a prior art ultra wideband LTCC antenna;
FIG. 7 is a chart comparing standing wave ratios of an ultra wideband notch antenna according to an embodiment of the present invention with a prior art ultra wideband LTCC antenna;
FIG. 8 is a gain contrast plot of an ultra wideband notch antenna according to an embodiment of the present invention versus a prior art ultra wideband LTCC antenna;
the reference numerals are as follows:
1-antenna magnet, 2-antenna pin, 201-ground pin, 202-feed pin, 203-empty pin, 3-antenna radiation electrode, 301-trapezoid branch, 302-rectangular patch, 303-bending groove, 4-through hole, 5-leading-out terminal electrode, 6-dielectric substrate, 7-clearance surface, 8-floor, 9-signal transmission line, 10-LC matching network.
Detailed Description
The invention will be further described with reference to the following drawings in conjunction with the preferred embodiments. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other.
It should be noted that, in this embodiment, the terms of left, right, upper, lower, top, bottom, etc. are merely relative terms, or refer to the normal use state of the product, and should not be considered as limiting.
The embodiment of the invention shows an ultra-wideband notch antenna, which increases the notch characteristics of WiMAX and WLAN frequency bands at the 5.5GHz center frequency through a through hole and a leading-out terminal electrode on the basis of the ultra-wideband LTCC antenna in the prior art, and preferably, a bending groove is etched on the surface of a radiation electrode of the antenna at the same time, so that the antenna generates the notch characteristics at the 3.5GHz center frequency, and therefore, the LTCC antenna can ensure that the WiMAX frequency band at the 3.5GHz center frequency and the WiMAX frequency band and the WLAN frequency band at the 5.5GHz center frequency are not interfered with each other when the LTCC antenna communicates in the UWB frequency.
As shown in fig. 1, 2, 3 and 4, the ultra wideband notch antenna shown in this embodiment is an LTCC antenna based on low temperature co-fired ceramic, and includes an antenna magnet 1, an antenna pin 2, an antenna radiation electrode 3 and a lead-out electrode 5, where the antenna radiation electrode 3 and the lead-out electrode 5 are respectively disposed on the upper and lower surfaces of the antenna magnet 1, a through hole 4 is disposed on the antenna magnet 1, and the antenna radiation electrode 3 is connected with the lead-out electrode 5 through the through hole 4.
One end of the antenna radiation electrode 3 is connected to the feed pin 202, and the lead-out terminal electrode 5 is disposed near the other end of the antenna radiation electrode 3. As shown in fig. 4, the terminal electrode is preferably U-shaped with an opening toward the outside of the antenna magnet 1. The end of the antenna magnet 1 is provided with at least two free pins 203, and both ends of the terminal electrode 5 are respectively connected with the two free pins 203. The antenna radiation electrode 3, the through hole 4 and the lead-out terminal electrode 5 are symmetrical about the same central axis.
The antenna radiation electrode 3 comprises a rectangular patch 302, and in a preferred embodiment, a bending groove 303 is provided on the rectangular patch 302, the bending groove 303 is in a shape of a mouth with a notch towards the outer side of the antenna magnet 1, and at the notch, two broken channels of the bending groove 303 are vertically bent and extended towards the inner part of the mouth. The antenna radiation electrode 3 further includes a trapezoid branch 301, a lower bottom of the trapezoid branch 301 is connected to the rectangular patch 302, and an upper bottom of the trapezoid branch 301 is connected to the feed pin 202.
The function of the trapezoid branch 301 is to achieve broadband impedance matching, as shown in fig. 3, the length B of the bottom of the trapezoid branch 301 is 3 times greater than the length a of the top, so that impedance transformation is smoother, no abrupt impedance change occurs, and a wider frequency band is achieved. The rectangular patch 302 functions to achieve radiation in the UWB band, the bending groove 303 functions to increase the notch characteristics in the WiMAX band at the 3.5GHz center frequency, and the through hole 4 and the terminal electrode 5 function to increase the notch characteristics in the WiMAX and WLAN bands at the 5.5GHz center frequency. The length of the through hole 4 can be adjusted to the notch frequency at the center frequency of 5.5GHz, except for connecting the antenna radiation electrode 3 and the terminal electrode 5.
The ultra-wideband notch antenna of the embodiment further comprises a dielectric substrate 6, a clearance surface 7, a floor 8 and a signal transmission line 9 are arranged on the dielectric substrate 6, the antenna magnet 1 is arranged on the clearance surface 7 of the dielectric substrate 6, a feed pin 202 and a grounding pin 201 are arranged on the antenna magnet 1, the feed pin 202 is connected with the signal transmission line 9, and the grounding pin 201 is connected with the floor 8.
As shown in fig. 5, the ultra-wideband notch antenna of the present embodiment actually operates on the dielectric substrate 6. In the dielectric substrate 6, the material grade was FR4 (dielectric constant 4.4, loss tangent 0.02). The antenna magnet 1 has a length L1 and a width W1. When the antenna magnet 1 is 10060 metric in size, and the length and width are 10mm by 6mm by 1.2mm, the radiation characteristics in the pass band and the notch characteristics in the stop band are optimal. The clearance surface 7 has a length L2 and a width W2. The area of the clearance surface 7 (the area without floors above and below the substrate) is 14.5mm by 20.7mm, the signal transmission line 9 is a signal part of a 50 ohm transmission line, the floor 8 is a floor part of the 50 ohm transmission line, the through holes 4 are connected with the floors 8 above and below, and the signal transmission line 9 is also provided with an LC matching network 10.
As shown in fig. 6, which is a graph comparing return loss of the ultra wideband notch antenna of the present embodiment and the ultra wideband LTCC antenna of the prior art, it can be seen that a notch is generated at the center frequencies of 3.5GHz and 5.5GHz, and the bandwidth of the ultra wideband LTCC antenna of the prior art meets the UWB band.
As shown in fig. 7, which is a graph showing standing wave ratio comparison between the ultra wideband notch antenna of the present embodiment and the ultra wideband LTCC antenna of the prior art, it can be seen that a notch is generated at the center frequencies of 3.5GHz and 5.5GHz, and the bandwidth of the ultra wideband LTCC antenna of the prior art satisfies the UWB band.
As shown in fig. 8, which is a graph comparing the gain of the ultra wideband notch antenna of the present embodiment with that of the prior art ultra wideband LTCC antenna, it can be seen that a notch is generated at the center frequencies of 3.5GHz and 5.5GHz, and the gain of the prior art ultra wideband LTCC antenna is relatively gentle.
The present embodiment causes the ultra wideband notch antenna of the present embodiment to create a notch at the center frequency of 5.5GHz by adding the via and the terminal electrode 5. Further, the present embodiment adds a bending groove 303 and a terminal electrode 5 with a certain length, so that the ultra-wideband notch antenna of the present embodiment generates a notch at the center frequency of 3.5GHz and 5.5GHz, respectively. The above notch energy makes the gain of the ultra-wideband notch antenna of this embodiment very small, and realizes the shielding of interference signals. So far, the ultra-wideband notch antenna of the embodiment can prevent the WiMAX frequency band at the 3.5GHz center frequency and the WiMAX frequency band and the WLAN frequency band at the 5.5GHz frequency center from interfering with each other when the UWB frequency band is communicated.
The ultra-wideband notch antenna structure of the embodiment adopts a symmetrical structure, so that the current distribution on the surface of the ultra-wideband notch antenna of the embodiment is more uniform, and the gain of the ultra-wideband notch antenna of the embodiment in a passband is more flat.
The connection part of the antenna radiation electrode 3 and each pin is in a trapezoid structure, and broadband impedance matching can be achieved, so that the ultra-wideband notch antenna of the embodiment can cover a broadband of 3.1-10.3 GHz.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several equivalent substitutions and obvious modifications can be made without departing from the spirit of the invention, and the same should be considered to be within the scope of the invention.
Claims (10)
1. The ultra-wideband notch antenna is characterized by comprising an antenna magnet, an antenna radiation electrode and a leading-out end electrode, wherein the antenna radiation electrode and the leading-out end electrode are respectively arranged in the upper area and the lower area of the antenna magnet, a through hole is formed in the antenna magnet, and the antenna radiation electrode is connected with the leading-out end electrode through the through hole.
2. The ultra-wideband notch antenna of claim 1, wherein one end of the antenna radiating electrode is connected to a feed pin, and the terminal electrode is disposed near the other end of the antenna radiating electrode, preferably the terminal electrode is U-shaped with an opening direction toward the outside of the antenna magnet.
3. The ultra-wideband notch antenna of claim 2, wherein the antenna magnet has at least two free pins at ends thereof, and the terminal electrode has two ends connected to the two free pins, respectively.
4. The ultra-wideband notch antenna of any one of claims 1 to 3, wherein the antenna radiating electrode, the via and the terminal electrode are symmetrical about the same central axis.
5. The ultra-wideband notch antenna of any one of claims 1 to 4, wherein the antenna radiating electrode comprises a rectangular patch, and a bending groove is provided on the rectangular patch, the bending groove is a notch shape having a notch toward the outside of the antenna magnet, and at the notch, two broken channels of the bending groove are bent and extended vertically toward the inside of the notch shape.
6. The ultra-wideband notch antenna of claim 5, wherein the antenna radiating electrode further comprises a trapezoidal branch, a lower base of the trapezoidal branch being connected to the rectangular patch, an upper base of the trapezoidal branch being connected to a feed pin.
7. The ultra-wideband notch antenna of claim 6, wherein the lower base length of the trapezoid branch is greater than 3 times the upper base length.
8. The ultra-wideband notch antenna of any one of claims 1 to 7, further comprising a dielectric substrate, the dielectric substrate having a headroom surface, a ground plate, and a signal transmission line disposed thereon, the antenna magnet being disposed on the headroom surface of the dielectric substrate, the antenna magnet having a feed pin and a ground pin disposed thereon, the feed pin being connected to the signal transmission line, the ground pin being connected to the ground plate.
9. The ultra-wideband notch antenna of any one of claims 1 to 8, wherein the antenna magnet is of metric 10060 dimensions, a standard value of length, width and height is 10mm x 6mm x 1.2mm, wherein the length is in the range of 10 ± 0.3mm, the width is in the range of 6 ± 0.3mm, and the height is in the range of 1.2 ± 0.2mm.
10. Ultra wideband notch antenna according to any one of claims 1 to 9, being a LTCC antenna based on low temperature co-fired ceramics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311647348.5A CN117791140A (en) | 2023-12-04 | 2023-12-04 | Ultra-wideband notch antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311647348.5A CN117791140A (en) | 2023-12-04 | 2023-12-04 | Ultra-wideband notch antenna |
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| Publication Number | Publication Date |
|---|---|
| CN117791140A true CN117791140A (en) | 2024-03-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311647348.5A Pending CN117791140A (en) | 2023-12-04 | 2023-12-04 | Ultra-wideband notch antenna |
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| CN (1) | CN117791140A (en) |
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- 2023-12-04 CN CN202311647348.5A patent/CN117791140A/en active Pending
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